We know the Negative Pressure process because we invented it
over 40 years ago!

We are the top Manufacturer of Negative Pressure Temperature Controllers.

LEAK STOPPING WITH A NEGATIVE PRESSURE SYSTEM

The reason that fluid leaks out from inside of a mold is because the pressure of the fluid inside is greater than the pressure of the air outside. If you had a small hole on a hose for example, and the pressure of the air pushing in on it was strong enough, it would keep the fluid inside the hose. Since it is impractical to increase the pressure of the atmosphere, a Logic Seal Unit provides a way to decrease the pressure of the fluid at the leak so that the air can hold it in. When using a Logic Seal Brand "Leak Stopper," the fluid is pulled past the leak at a lower pressure.

Regulating the fluid pressure to a mold does not necessarily reduce the fluid flow. Because a Logic Seal Unit draws a vacuum on the "From Mold" line, the over-all pressure drop remains the same or even increases. This means that there is no loss of cooling flow and in some cases it may even be improved.